AIR BRAKES CDL PRACTICE TEST - ALABAMA
11.
The application pressure gauge shows:
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how much pressure is in the air tanks.
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how much air pressure you are applying to the brakes.
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how much pressure the relay valves should send to the trailer brakes.
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All of the above.
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12.
You should NOT use the parking brakes if:
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the brakes are too dry.
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the brakes are cold.
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the brakes are very hot.
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All of the above.
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13.
If you must stop on a one-way or divided highway, place your warning devices:
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50 feet, 100 feet, and 150 feet toward the approaching traffic.
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100 feet, 200 feet, and 300 feet toward the approaching traffic.
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10 feet, 100 feet, and 200 feet toward the approaching traffic.
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10 feet, 50 feet, and 150 feet toward the approaching traffic.
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14.
How can you tell if your vehicle is equipped with ABS?
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Trailers will have yellow ABS malfunction lamps on the left side.
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Look under the vehicle for the wheel speed sensor wires coming from the back of the brakes.
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Look for yellow ABS malfunction lamps on the instrument panel.
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All of the above.
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15.
Pressing and releasing the brake pedal unnecessarily can:
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causes all the air to be lost.
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causes friction, which slows the vehicle.
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let air out faster than the compressor can replace it.
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apply more air pressure.
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